Organic corrosion inhibitors for aluminium and its alloys in acid solutions: a review

RSC Advances ◽  
2016 ◽  
Vol 6 (67) ◽  
pp. 62833-62857 ◽  
Author(s):  
Klodian Xhanari ◽  
Matjaž Finšgar
Keyword(s):  
Organic Compounds ◽  
Corrosion Inhibition ◽  
Corrosion Inhibitors ◽  
Acid Solutions ◽  
Acidic Solutions ◽  
Organic Corrosion Inhibitors

Corrosion inhibition of aluminium in acidic solutions using different organic compounds.

Corrosion Inhibition in Acidic Environments: Key Interfacial Insights with Photoelectron Spectroscopy

2022 ◽  
Author(s):  
Kiran Kousar ◽  
Michael Dowhyj ◽  
Monika Walczak ◽  
Thomas Ljungdahl ◽  
Alexander Wetzel ◽  
...  
Keyword(s):  
Corrosion Inhibition ◽  
Photoelectron Spectroscopy ◽  
Corrosion Inhibitors ◽  
Acidic Solutions ◽  
Organic Species ◽  
Highly Effective ◽  
Surface Active ◽  
Acidic Environments

In many engineering scenarios, surface-active organic species are added to acidic solutions to inhibit the corrosion of metallic components. Given suitable selection, such corrosion inhibitors are highly effective, preventing significant...

scholarly journals Study on efficiency of corrosion inhibitors based on derivatives of isothiuronic salts

2021 ◽  
Vol 11 (2) ◽  
pp. 326-332
Author(s):  
I. A. Ushakov ◽  
V. S. Nikonova ◽  
I. V. Polynskii ◽  
L. G. Knyazeva ◽  
M. M. Polynskaya ◽  
...  
Keyword(s):  
Organic Compounds ◽  
Corrosion Inhibitors ◽  
Covalent Bonds ◽  
Protective Properties ◽  
Nickel Coatings ◽  
Layer Adsorption ◽  
Steel 20 ◽  
Organic Corrosion Inhibitors ◽  
Derivatives Of ◽  
Active Centres

Metals play a pivotal role in industry; their use constantly grows. It is virtually impossible to find an industrial field without the use of metals and their alloys. However, owing to the quality degradation of metal during the operational process, corrosion appears not only on its surface but also under a coating, which leads to its destruction. To avoid this, corrosion inhibitors are necessary. Organic compounds have been widely used as corrosion inhibitors. Many organic corrosion inhibitors have been developed nowadays. In the literature, organic compounds comprising N, O, S and P heteroatoms are described, which reduce corrosion rate. The organic compounds are adsorbed on the metal surface, forming a thin layer. Adsorption occurs either through electrostatic interaction or, in some cases, the formation of covalent bonds. The work aimed to study isothiuronic salts as corrosion inhibitors to evaluate their protective properties using the polarisation curves method. Objects of research were isothiuronic compounds containing two active centres separated by saturated and unsaturated carbon bonds (structures 1-3). In structures 4-7, one isothiuronic fragment has different propylene substituting groups. It has been previously shown that these compounds can act as effective brightening agents when applying nickel coatings. A model solution with a density of 1.12 g/cm3 was prepared to study the corrosion inhibitors. The corrosion inhibitor concentration was 400 mg/L. Studies have shown that the compounds with two isothiuronic moieties do not always exhibit improved properties for inhibiting metal degradation in a corrosive environment. In particular, they showed worsening of the inhibiting properties for samples made of steel 20 and identical properties for that made of steel 3.

Organic corrosion inhibitors for industrial cleaning of ferrous and non-ferrous metals in acidic solutions: A review

2018 ◽  
Vol 256 ◽  
pp. 565-573 ◽  
Author(s):  
Madhusudan Goyal ◽  
Sudershan Kumar ◽  
Indra Bahadur ◽  
Chandrabhan Verma ◽  
Eno E. Ebenso
Keyword(s):  
Corrosion Inhibitors ◽  
Acidic Solutions ◽  
Ferrous Metals ◽  
Non Ferrous Metals ◽  
Industrial Cleaning ◽  
Organic Corrosion Inhibitors

scholarly journals Behaviour of ortho-N-Glycoside as Green Corrosion Inhibitors for Tin in 0.5 M Citric Acid

2020 ◽  
Vol 32 (9) ◽  
pp. 2237-2242
Author(s):  
MERVATE MOHAMED MOHAMED ◽  
FATIMA A. AL-QADRI ◽  
RAIEDHAH ALSAIARI ◽  
IMAN MOHAMMAD SHEDAIWA ◽  
MABKHOOT ALSAIARI ◽  
...  
Keyword(s):  
Citric Acid ◽  
Corrosion Inhibition ◽  
Corrosion Inhibitors ◽  
Inhibition Efficiency ◽  
Acid Solutions ◽  
Electrochemical Reactivity ◽  
Corrosion Inhibition Efficiency ◽  
Green Corrosion Inhibitors ◽  
Electrochemical Microscopy ◽  
Scanning Electron

A bio-nondegradable functional glycoside derivative, viz. ortho-N-glycoside, was extracted from natural cabbage plants and its corrosion inhibition behavior was evaluated in relation to tin in a 0.5 M citric solution. An electrochemical study, using potentiodynamic polarization and scanning electrochemical microscopy (SEM), was conducted to determine corrosion inhibition. The results indicate that ortho-Nglycoside possesses a corrosion inhibition efficiency of 75.83% at a concentration of 0.5 mol L-1. The results of adsorption over the tin surface obeys Langmuir isotherm. The surface and the electrochemical reactivity of the tin samples in the citric acid solutions were examined using the SEM technique. This enable the corrosion type to be demonstrated. The results of the surface analysis be obtained using scanning electron microscopy (SEM).

scholarly journals THEORETICAL MODELING OF IMINOISATIN DERIVATIVES AS CORROSION INHIBITORS OF STEEL IN ACID SOLUTION

2020 ◽  
Vol 4 (3) ◽  
pp. 672-678
Author(s):  
Babatunde Temitope Ogunyemi ◽  
Sunday Gbenga Borisade
Keyword(s):  
Corrosion Inhibition ◽  
Corrosion Inhibitors ◽  
Inhibition Efficiency ◽  
Mechanical Method ◽  
Quantum Chemical Descriptors ◽  
Quantum Mechanical Method ◽  
Electronic Parameters ◽  
Chemical Descriptors ◽  
Corrosion Inhibition Efficiency ◽  
Organic Corrosion Inhibitors

The effect of two iminoisatin derivatives [1-morpholinomethyl-3(1-N-dithiooxamide) iminoisatin (molecule 1)] and 1-diphenylaminomethyl-3(1-N-dithiooxamide) iminoisatin (molecule 2) on corrosion inhibition were theoretically investigated using quantum mechanical method. Their electronic parameters and quantum chemical descriptors that predict their adsorption and hence their inhibition efficiency were estimated using the DFT//B3LYP/6-31G (d) method. The results established a relationship between the quantum descriptors and corrosion inhibition efficiency, and also confirmed molecule 2 to be a better corrosion inhibitor and provide a guide to the synthesis of more efficient organic corrosion inhibitors.

High-temperature corrosion of steels in acid solutions. Part 2. Inhibitor protection of steels by unsaturated organic compounds. Review

2020 ◽  
pp. 1-19
Author(s):  
Ya.G. Avdeev ◽  
◽  
Yu.I. Kuznetsov ◽  
Keyword(s):  
High Temperature ◽  
Organic Compounds ◽  
Corrosion Inhibitors ◽  
High Temperature Corrosion ◽  
Chemical Transformations ◽  
Acid Solutions ◽  
Slowing Down ◽  
Mineral Acids ◽  
Protective Polymer ◽  
Unique Mechanism

The general regularities of the influence of temperature (t) of acid solutions on the protection effectiveness of steel in them by organic compounds have been considered. The effectiveness of organic compounds in slowing down the corrosion of steels, as a rule, either decreases with increasing t or passes through a maximum at 60 °C. It was noted that there is a group of high-temperature corrosion inhibitors, the temperature maximum of which lies above 60 °C, that allows them to be used in the protection of steels even in environments with t > 100 °C. The general approaches to the protection of steels in solutions of mineral acids under conditions of high-temperature corrosion (t > 80 °C) with unsaturated organic compounds (UC) and mixtures based on them were analyzed. The use of multicomponent compound containing UC is appropriate for the protection of steels in high-temperature solutions of acids, in some cases at t up to 250 °C. The ability to protect steels at such high t is due to the unique mechanism of the UC inhibitory action, which is the result of their ability to chemisorption on the metal surface and undergo deep chemical transformations leading to the formation of a protective polymer film. Limitations on the use of UC as corrosion inhibitors are associated with their chemical instability in volume of acid, as well as toxicity of UC itself and composite additives used with them.

Effect of Anions and Organic Corrosion Inhibitors on the Rate of Hydrogen Penetration of Iron

CORROSION ◽  
1980 ◽  
Vol 36 (4) ◽  
pp. 178-182 ◽  
Author(s):  
Y. SAITO ◽  
KEN NOBE
Keyword(s):  
Organic Compounds ◽  
Corrosion Inhibitors ◽  
Penetration Rate ◽  
The Other ◽  
Other Hand ◽  
Hydrogen Penetration ◽  
Organic Corrosion Inhibitors ◽  
Strong Acids

Abstract The rates of hydrogen penetration of annealed iron in different acids (pH 0.3), H2SO4, HCl, HClO4, and H3PO4, in the absence and presence of the organic compounds, benzotriazole, methylhydroxypentyne, and thiourea, have been measured. Although the differences in the hydrogen penetration rates of iron in the strong acids are not substantial, the penetration rate of iron in H3PO4 is significantly larger than that measured in the three strong acids. Both Benzotriazole (BTA) and methylhydroxypentyne (MHP) retard hydrogen penetration in all three strong acids. On the other hand, thiourea (TU) substantially accelerates penetration due to the presence of H2S. Anion effects on hydrogen penetration are small in the presence of BTA and MHP, while they are insignificant in the presence of TU.

scholarly journals Orthophosphoric acid solutions of sodium orthovanadate, sodium tungstate, and sodium molybdate as potential corrosion inhibitors of the Al2Cu intermetallic phase

2019 ◽  
Vol 23 (11) ◽  
pp. 3019-3029 ◽  
Author(s):  
Przemysław Kwolek ◽  
Kamil Dychtoń ◽  
Maciej Pytel
Keyword(s):  
Corrosion Rate ◽  
Corrosion Inhibition ◽  
Corrosion Inhibitors ◽  
Orthophosphoric Acid ◽  
Sodium Tungstate ◽  
Intermetallic Phase ◽  
Sodium Molybdate ◽  
Acid Solutions ◽  
Sodium Orthovanadate ◽  
Vanadium Phosphate

Abstract Orthophosphoric acid solutions of sodium orthovanadate, sodium tungstate, and sodium molybdate are tested as potential corrosion inhibitors of the Al2Cu intermetallic phase. Corrosion inhibition is observed for 0.2 M solutions of Na3VO4 and Na2WO4 by increasing the pH to > 2. When the pH is < 2, the aforementioned salts increase the corrosion rate of the intermetallic phase. A 0.2 M solution of Na3VO4 causes the precipitation of vanadium phosphate on the surface of the Al2Cu phase at pH = 1.

scholarly journals EXPERIMENTAL STUDY AND HIGH DIMENSIONAL QSAR MODELLING OF PHENYLPROPANOIDS OF ALPINIA GALANGA AS CORROSION INHIBITORS ON MILD STEEL

2017 ◽  
Vol 79 (7) ◽  
Author(s):  
Sunday O. Ajeigbe ◽  
Norazah Basar ◽  
Zakariya Y. Algamal ◽  
Muhammad H. Lee ◽  
Hasmerya Maarof ◽  
...  
Keyword(s):  
Mild Steel ◽  
Organic Compounds ◽  
Corrosion Inhibition ◽  
Corrosion Inhibitors ◽  
Mean Squared Error ◽  
Quantitative Structure Activity Relationship ◽  
Elastic Net ◽  
High Dimensional ◽  
Qsar Study ◽  
Alpinia Galanga

Plant extracts as corrosion inhibitors have been extensively investigated and are found as an alternative to synthetic organic compounds. The corrosion inhibition of mild steel in 1 M HCl by 15 compounds comprising of five phenylpropanoids from Alpinia galanga and other related compounds was explored experimentally using potentiodynamic polarisation procedures. The inhibition efficiencies determined experimentally for the various inhibitors were used in the Quantitative Structure-Activity Relationship (QSAR) study with their molecular descriptors calculated using Dragon software. Penalised multiple linear regression (PMLR) was adopted as the method of variable selection using elastic net penalty. The elastic net results show low mean-squared error of the training set (MSEtrain) of 0.121 and test set (MSEtest) of 0.131. The model obtained can be applied to predict the corrosion inhibition efficiencies of related organic compounds. Results also reveal that the PMLR based on elastic net penalty is effective in dealing with high dimensional data.   

Sign in / Sign up

Export Citation Format

Share Document